<!DOCTYPE html>
<html xmlns:th="https://www.thymeleaf.org">
<body>
<h1>spring boot file upload files</h1>
<form method="post" action="/upload_controller/upload_files" enctype="multipart/form-data">
    <!--input上传文件的标签name要和controller中的name相同-->
    <input type="file" name="files" multiple="multiple"/><br><br>
    <input type="submit" value="submit"/>
</form>
</body>
</html>